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The function sin^(4)x+cos^(4)x is increa...

The function `sin^(4)x+cos^(4)x` is increasing in the interval

A

`[(5pi)/(8), (3pi)/(4)]`

B

`[(pi)/(2), (5pi)/(8)]`

C

`[(pi)/(4), (pi)/(2)]`

D

`[0, (pi)/(4)]`

Text Solution

Verified by Experts

The correct Answer is:
C
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